I picked up a frame a few weeks back that had been spray bombed flat black. It seemed like a decent frame with clean brazing. It's relatively light weight and takes a 27.0mm seat post. The other day I applied some citrus-based paint remover to the downtube and top tube to see if any decals were revealed. Here's what I found:





Looks like most of the frame is yellow, but that downtube is black. Any ideas as to which model Centurion? Will the serial # tell me anything?